Ian you are reminding me on a road trip to Calgary, trying to eke those last few kms of gas out of the tank to get to a gas station in Medicine Hat! No fear, we'll get you above your self imposed benchmark.
I think your being too hard on your imps, I like them both and really like the basing you've used. An who doesn't love a Giant Rat? I'll score the Imps as full 25mm and the rates as 15s, so that comes out to 16 points in my books.